diff --git a/apps/selfhost/tools/dep_tree_min_string.nyash b/apps/selfhost/tools/dep_tree_min_string.nyash
index 9b2b5f6e..bc6acee1 100644
--- a/apps/selfhost/tools/dep_tree_min_string.nyash
+++ b/apps/selfhost/tools/dep_tree_min_string.nyash
@@ -78,9 +78,7 @@ static box Main {
       if in_cmt == 1 {
         if ch == "\n" { in_cmt = 0 }
         i = i + 1
-        continue
-      }
-      if in_str == 1 {
+      } else if in_str == 1 {
         if ch == "\"" {
           // if previous is not backslash, close
           if i == 0 { in_str = 0 } else {
@@ -89,24 +87,32 @@ static box Main {
           }
         }
         i = i + 1
-        continue
-      }
-      // not in string/comment
-      if ch == "/" && i + 1 < n && src.substring(i+1, i+2) == "/" { in_cmt = 1; i = i + 2; continue }
-      if ch == "#" { in_cmt = 1; i = i + 1; continue }
-      if ch == "\"" { in_str = 1; i = i + 1; continue }
-      // look for include "
-      if i + 9 <= n && src.substring(i, i+9) == "include \"" {
+      } else if ch == "/" && i + 1 < n && src.substring(i+1, i+2) == "/" {
+        // start // comment
+        in_cmt = 1
+        i = i + 2
+      } else if ch == "#" {
+        // start # comment
+        in_cmt = 1
+        i = i + 1
+      } else if ch == "\"" {
+        // enter string
+        in_str = 1
+        i = i + 1
+      } else if i + 9 <= n && src.substring(i, i+9) == "include \"" {
+        // look for include "..."
         local j = i + 9
-        // find closing quote (respect escapes)
-        loop(j < n) {
+        // find closing quote (respect escapes) without using break
+        local found = 0
+        loop(j < n && found == 0) {
           if src.substring(j, j+1) == "\"" {
             local prev = src.substring(j-1, j)
-            if prev != "\\" { break }
+            if prev != "\\" { found = 1 } else { j = j + 1 }
+          } else {
+            j = j + 1
           }
-          j = j + 1
         }
-        if j < n {
+        if found == 1 {
           local p = src.substring(i+9, j)
           if inc_first == 1 {
             incs = incs + "\"" + me.esc_json(p) + "\""
@@ -129,23 +135,22 @@ static box Main {
             children = children + "," + cj
           }
           i = j + 1
-          continue
+        } else {
+          i = i + 1
         }
+      } else {
+        i = i + 1
       }
-      i = i + 1
     }
     return "{\\\"path\\\":\\\"" + me.esc_json(path) + "\\\",\\\"includes\\\":[" + incs + "],\\\"children\\\":[" + children + "]}"
   }
 
   main(args) {
     local console = new ConsoleBox()
+    // Determine entry path (avoid stdin to keep VM path simple)
     local entry = null
     if args != null && args.length() >= 1 { entry = args.get(0) }
-    if entry == null || entry == "" {
-      // try stdin first line
-      local line = console.readLine()
-      if line != null && line != "" { entry = line } else { entry = "apps/selfhost/ny-parser-nyash/main.nyash" }
-    }
+    if entry == null || entry == "" { entry = "apps/selfhost/ny-parser-nyash/main.nyash" }
     local tree = me.node_json(entry, "\n" + entry + "\n", 0)
     local out = "{\\\"version\\\":1,\\\"root_path\\\":\\\"" + me.esc_json(entry) + "\\\",\\\"tree\\\":" + tree + "}"
     console.println(out)
diff --git a/src/grammar/generated.rs b/src/grammar/generated.rs
index afca40cf..0f04d259 100644
--- a/src/grammar/generated.rs
+++ b/src/grammar/generated.rs
@@ -50,7 +50,6 @@ pub static SYNTAX_ALLOWED_STATEMENTS: &[&str] = &[
     "print",
     "nowait",
     "include",
-    "import",
     "local",
     "outbox",
     "try",
@@ -67,4 +66,4 @@ pub static SYNTAX_ALLOWED_BINOPS: &[&str] = &[
     "or",
     "eq",
     "ne",
-];
+];
\ No newline at end of file
diff --git a/src/parser/declarations/box_definition.rs b/src/parser/declarations/box_definition.rs
index cf6809a1..cbe6c569 100644
--- a/src/parser/declarations/box_definition.rs
+++ b/src/parser/declarations/box_definition.rs
@@ -438,7 +438,7 @@ impl NyashParser {
                         self.consume(TokenType::RBRACE)?;
                         self.skip_newlines();
                         continue;
-                    } else if self.match_token(&TokenType::IDENTIFIER) {
+                    } else if matches!(self.current_token().token_type, TokenType::IDENTIFIER(_)) {
                         // 単行形式: public name[: Type]
                         let fname = if let TokenType::IDENTIFIER(n) = &self.current_token().token_type { n.clone() } else { unreachable!() };
                         self.advance();
diff --git a/src/runner/mod.rs b/src/runner/mod.rs
index d4445a77..f4fb5125 100644
--- a/src/runner/mod.rs
+++ b/src/runner/mod.rs
@@ -115,47 +115,28 @@ impl NyashRunner {
             }
             return;
         }
-        // CLI using/module overrides (MVP): apply early so JSON pipeline can observe them
-        if self.config.using.is_some() || self.config.using_path.is_some() || self.config.modules.is_some()
-            || std::env::var("NYASH_USING_PATH").is_ok() || std::env::var("NYASH_MODULES").is_ok() {
-            let mut using_paths: Vec<String> = Vec::new();
-            if let Some(p) = self.config.using_path.clone() { for s in p.split(':') { let s=s.trim(); if !s.is_empty() { using_paths.push(s.to_string()); } } }
-            if let Ok(p) = std::env::var("NYASH_USING_PATH") { for s in p.split(':') { let s=s.trim(); if !s.is_empty() { using_paths.push(s.to_string()); } } }
-            if using_paths.is_empty() { using_paths.extend(["apps","lib","."].into_iter().map(|s| s.to_string())); }
-
-            // modules mapping
-            let mut modules: Vec<(String,String)> = Vec::new();
-            if let Some(m) = self.config.modules.clone() { for ent in m.split(',') { if let Some((k,v)) = ent.split_once('=') { let k=k.trim(); let v=v.trim(); if !k.is_empty() && !v.is_empty() { modules.push((k.to_string(), v.to_string())); } } } }
-            if let Ok(ms) = std::env::var("NYASH_MODULES") { for ent in ms.split(',') { if let Some((k,v)) = ent.split_once('=') { let k=k.trim(); let v=v.trim(); if !k.is_empty() && !v.is_empty() { modules.push((k.to_string(), v.to_string())); } } } }
-            for (ns, path) in &modules { let sb = crate::box_trait::StringBox::new(path.clone()); crate::runtime::modules_registry::set(ns.clone(), Box::new(sb)); }
-
-            // using specs
-            let mut pending_using: Vec<(String, Option<String>, bool)> = Vec::new(); // (target, alias, is_path)
-            if let Some(u) = self.config.using.clone() {
-                for ent in u.split(',') {
-                    let s = ent.trim().trim_end_matches(';').trim(); if s.is_empty() { continue; }
-                    let (tgt, alias) = if let Some(pos) = s.find(" as ") { (s[..pos].trim().to_string(), Some(s[pos+4..].trim().to_string())) } else { (s.to_string(), None) };
-                    let is_path = tgt.starts_with('"') || tgt.starts_with("./") || tgt.starts_with('/') || tgt.ends_with(".nyash");
-                    pending_using.push((tgt.trim_matches('"').to_string(), alias, is_path));
+        // Using/module overrides via env only (MVP)
+        // Prepare shared accumulators for script/env processing
+        let mut using_paths: Vec<String> = Vec::new();
+        let mut pending_modules: Vec<(String, String)> = Vec::new();
+        let mut pending_using: Vec<(String, Option<String>)> = Vec::new();
+        // Using-paths from env, with defaults
+        if let Ok(p) = std::env::var("NYASH_USING_PATH") {
+            for s in p.split(':') { let s=s.trim(); if !s.is_empty() { using_paths.push(s.to_string()); } }
+        }
+        if using_paths.is_empty() { using_paths.extend(["apps","lib","."].into_iter().map(|s| s.to_string())); }
+        // Modules mapping from env (e.g., FOO=path)
+        if let Ok(ms) = std::env::var("NYASH_MODULES") {
+            for ent in ms.split(',') {
+                if let Some((k,v)) = ent.split_once('=') {
+                    let k=k.trim(); let v=v.trim();
+                    if !k.is_empty() && !v.is_empty() { pending_modules.push((k.to_string(), v.to_string())); }
                 }
             }
-            // Resolve using (priority: modules > relative(file) > using-paths; ambiguous=error if strict)
-            let strict = std::env::var("NYASH_USING_STRICT").ok().as_deref() == Some("1");
-            let verbose = std::env::var("NYASH_CLI_VERBOSE").ok().as_deref() == Some("1");
-            let ctx = self.config.file.as_deref().and_then(|f| std::path::Path::new(f).parent());
-            for (tgt, alias, is_path) in pending_using.into_iter() {
-                if is_path && !std::path::Path::new(&tgt).exists() {
-                    if strict { eprintln!("❌ using: path not found: {}", tgt); std::process::exit(1); }
-                    if verbose { eprintln!("[using] path not found (continuing): {}", tgt); }
-                }
-                let value = match resolve_using_target(&tgt, is_path, &modules, &using_paths, ctx, strict, verbose) {
-                    Ok(v) => v,
-                    Err(e) => { eprintln!("❌ using: {}", e); std::process::exit(1); }
-                };
-                let sb = crate::box_trait::StringBox::new(value.clone());
-                crate::runtime::modules_registry::set(tgt.clone(), Box::new(sb));
-                if let Some(a) = alias { let sb2 = crate::box_trait::StringBox::new(value); crate::runtime::modules_registry::set(a, Box::new(sb2)); }
-            }
+        }
+        for (ns, path) in pending_modules.iter() {
+            let sb = crate::box_trait::StringBox::new(path.clone());
+            crate::runtime::modules_registry::set(ns.clone(), Box::new(sb));
         }
         // Stage-1: Optional dependency tree bridge (log-only)
         if let Ok(dep_path) = std::env::var("NYASH_DEPS_JSON") {